Solid & Variable ND Filter True Optical Density (EV), Tint Cast & IR-Pollution Auditor

Deterministic Linear RAW ADU exposure-time normalized ratio D = -log10(I_nd/I_ref) -> EV = D/0.30103 + CIEDE2000 chromaticity shift + spatial X-cross variance engine (.dng, .arw, .cr3, .nef) built for PolarPro, NiSi, Breakthrough Photography, B+W — zero-upload ephemeral Wasm RAM execution.

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